| E | O (JD) | O (dat) | Period |
| -66 | 2415030 | 1900-01-10 | 393.86 |
| -65 | 2415410 | 1901-01-25 | 393.76 |
| -64 | 2415810 | 1902-03-01 | 395.11 |
| -57 | 2418580 | 1909-09-30 | 395.54 |
| -56 | 2418960 | 1910-10-15 | 396.07 |
| -55 | 2419350 | 1911-11-09 | 396.15 |
| -54 | 2419747 | 1912-12-10 | 395.92 |
| -52 | 2420580 | 1915-03-23 | 395.65 |
| -45 | 2423330 | 1922-10-02 | 395.91 |
| -44 | 2423743 | 1923-11-19 | 396.15 |
| -43 | 2424128 | 1924-12-08 | 396.13 |
| -39 | 2425680 | 1929-03-09 | 395.99 |
| -38 | 2426080 | 1930-04-13 | 395.3 |
| -33 | 2428080 | 1935-10-04 | 395.87 |
| -32 | 2428480 | 1936-11-07 | 395.53 |
| -31 | 2428878 | 1937-12-10 | 396.19 |
| -30 | 2429281 | 1939-01-17 | 396.08 |
| -29 | 2429655 | 1940-01-26 | 395.52 |
| -28 | 2430060 | 1941-03-06 | 395.06 |
| -22 | 2432420 | 1947-08-22 | 394.66 |
| -20 | 2433230 | 1949-11-09 | 394.56 |
| -19 | 2433600 | 1950-11-14 | 394.64 |
| -18 | 2434010 | 1951-12-29 | 393.9 |
| -16 | 2434810 | 1954-03-08 | 393.33 |
| -15 | 2435180 | 1955-03-13 | 392.73 |
| -4 | 2439529 | 1967-02-07 | 392.17 |
| -3 | 2439928 | 1968-03-12 | 392.21 |
| 8 | 2444220 | 1979-12-12 | 391.85 |
| 9 | 2444610 | 1981-01-05 | 391.56 |
| 10 | 2444980 | 1982-01-10 | 391.64 |
| 11 | 2445360 | 1983-01-25 | 390.85 |
| 12 | 2445785 | 1984-03-25 | 391.6 |
| 13 | 2446165 | 1985-04-09 | 394.05 |
| 14 | 2446553 | 1986-05-02 | 393.95 |
| 15 | 2446965 | 1987-06-18 | 396.25 |
| 16 | 2447375 | 1988-08-01 | 396.73 |
| 17 | 2447768 | 1989-08-29 | 395.93 |
| 18 | 2448130 | 1990-08-26 | 396.63 |
| 19 | 2448516 | 1991-09-16 | 396.12 |
| 20 | 2448960 | 1992-12-03 | 395.05 |
| 21 | 2449346 | 1993-12-24 | 394.13 |
| 22 | 2449735 | 1995-01-17 | 394.4 |
| 23 | 2450133 | 1996-02-19 | 395.39 |
| 24 | 2450520 | 1997-03-12 | 394.73 |
| 25 | 2450913 | 1998-04-09 | 392.45 |
| 26 | 2451294 | 1999-04-25 | 393.34 |
| 27 | 2451694 | 2000-05-29 | 392.76 |
| 28 | 2452102 | 2001-07-11 | 393.28 |
| 29 | 2452498 | 2002-08-11 | 392.98 |
| 30 | 2452873 | 2003-08-21 | 392.55 |
| 31 | 2453281 | 2004-10-02 | 391.95 |
| 32 | 2453650 | 2005-10-06 | 391.46 |
| 33 | 2454068 | 2006-11-28 | 391.82 |
| 34 | 2454439 | 2007-12-04 | 392.49 |
| 35 | 2454833 | 2009-01-01 | 394.08 |
| 36 | 2455220 | 2010-01-23 | 395.75 |
| 37 | 2455627 | 2011-03-06 | 397.22 |
| 38 | 2456032 | 2012-04-14 | 396.58 |
| 39 | 2456417 | 2013-05-04 | 397.33 |
| 40 | 2456825 | 2014-06-16 | 396.88 |
| 41 | 2457242 | 2015-08-07 | 396.92 |
| 42 | 2457622 | 2016-08-21 | 395.78 |
| 43 | 2458001 | 2017-09-04 | 395.25 |
| 44 | 2458400 | 2018-10-08 | 395.08 |
| 45 | 2458795 | 2019-11-07 | 393.68 |
| 46 | 2459204 | 2020-12-20 | 392.71 |
| 47 | 2459588 | 2022-01-08 | 395.26 |
| E | Cycle number from the GCVS4 epoch. |
| O (JD) | Julian date at observed time for maximum. |
| O (Dat) | Same as above, expressed as date. |
| Period | Calculated mean period at cycle number E. |